update, consolidate, and optimize `vm_vector_2_matrix`

I chatted with @Baezon about the various branch paths in `vm_vector_2_matrix`. After stable, the functions can be rewritten to be general-purpose for fvec-dominant vs uvec-dominant use cases, but we should also have fast simple function overloads for the common cases.

1. `vm_vector_2_matrix_fvec` and `vm_vector_2_matrix_uvec` specific functions (with `_norm` variants) for quickly generating a matrix from only a single vector
2. `vm_vector_2_matrix` (with `_norm` variant) for generating either an fvec-dominant or a uvec-dominant matrix where any two, or all three, vectors are supplied